External filter and aquarium

Abstract

The utility model discloses an external hanging filter and aquarium, wherein the external hanging filter comprises a shell, a filter cavity and a backflow port are arranged in the shell; a first water outlet pipe is communicated with a water inlet pipe, the first water outlet pipe is provided with a first water outlet, a second water outlet pipe is provided with a second water outlet, the second water outlet pipe is further provided with a third water outlet, when the second water outlet pipe is located at a first position, the first water outlet is communicated with the second water outlet, and the water flow in the water inlet pipe can flow to the filter cavity through the first water outlet and the second water outlet; when the second water outlet pipe is located at a second position, the first water outlet is spaced from the second water outlet, and the water flow in the water inlet pipe can be discharged through the third water outlet. The external hanging filter of the utility model can conveniently select the direction of water flow by the arrangement of the water guide assembly, control the water flow into the filter cavity to realize filter backflow, effectively clean the water body, or control the water flow to be discharged from the second water outlet pipe to the outside of the aquarium, and reduce the complexity of water replacement.

Description

Technical Field

[0001] This utility model relates to the field of aquarium technology, and in particular to an external filter and an aquarium. Background Technology

[0002] As people's living standards continue to improve, more and more residents are keeping pets. Beautiful tropical fish, cute little turtles, shrimp and crabs are the most common aquatic pets. The key to keeping aquatic pets is to keep the water clean.

[0003] Currently, common aquariums typically filter the water using hanging filters. Impurities in the aquarium water (such as fish excrement and food scraps) remain inside the filter media. After a period of use, the filter media needs to be cleaned and the aquarium water changed. Existing technology has the following drawbacks: the filters do not have a drainage function, requiring manual draining of the water from the aquarium, making water changes inconvenient. Utility Model Content

[0004] The purpose of this invention is to provide an external filter and aquarium with a simple structure that can switch between filtering and draining water within the aquarium, thereby improving the convenience of water changes.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, an external filter is provided, comprising a housing, a water inlet assembly, and a water guiding assembly. The housing contains a filter chamber and a return port communicating with the filter chamber, and the filter chamber contains filter media. The water inlet assembly includes an inlet pipe and a water pump. The inlet pipe is connected to the housing, and the water pump is mounted on the inlet pipe. The water guiding assembly includes a first outlet pipe and a second outlet pipe. The first outlet pipe communicates with the inlet pipe, and one of the first and second outlet pipes is inserted inside the other. The side wall of the first outlet pipe has a first outlet, and the second outlet pipe... The side wall of the water outlet pipe is provided with a second water outlet corresponding to the first water outlet. The second water outlet pipe is also provided with a third water outlet for discharging water outside the housing. The second water outlet pipe has a first position and a second position. When the second water outlet pipe is in the first position, the first water outlet and the second water outlet are connected, and the water in the water inlet pipe can flow to the filter chamber through the first water outlet and the second water outlet. When the second water outlet pipe is in the second position, the first water outlet and the second water outlet are separated, and the water in the water inlet pipe can be discharged through the third water outlet.

[0007] In one embodiment, the first outlet pipe includes a first pipe and a second pipe. The first pipe is connected to the inlet pipe and extends along a first direction. The second pipe is connected to the side wall of the first pipe. The connection between the first pipe and the second pipe is the first outlet. The second pipe extends along a second direction. A fourth outlet is provided at the end of the second pipe away from the first pipe. The fourth outlet communicates with the filter chamber. The second outlet pipe is inserted into the first pipe. When the second outlet pipe is rotated and / or moved along the first direction, such that when the second outlet pipe is in the first position, the second outlet communicates with the fourth outlet through the first outlet. The water flow in the inlet pipe can flow to the filter chamber through the second pipe. The first direction and the second direction are set at an angle.

[0008] In one embodiment, the external filter further includes a sealing ring. The outer peripheral wall of the second outlet pipe is provided with two first limiting grooves around its own central axis. The two first limiting grooves are respectively spaced apart on both sides of the second outlet along the first direction. The sealing ring is locked in each first limiting groove and abuts against the inner side wall of the first pipe.

[0009] In one embodiment, the second outlet pipe includes a third pipe and a fourth pipe. The length of the third pipe extends along the first direction and is inserted into the first pipe. The end of the third pipe away from the first pipe is connected to the fourth pipe. The length of the fourth pipe extends along the third direction, and the end of the fourth pipe away from the third pipe is provided with the third outlet. The fourth pipe and the second pipe are spaced apart along the first direction. The third pipe is movable along the first direction, so that the inlet of the second outlet pipe is spaced apart from the inlet of the second pipe. The water in the inlet pipe can pass through the third pipe and the fourth pipe and then be discharged from the third outlet. The first direction and the third direction are set at an angle.

[0010] In one embodiment, the outer peripheral wall of the third pipe is provided with a second limiting groove around its own central axis, and the inner side wall of the first pipe is provided with a snap-fit ​​part, and the snap-fit ​​part is adjacent to the end of the first pipe away from the water inlet pipe. When the snap-fit ​​part snaps with the second limiting groove, the second water outlet pipe switches to the first position.

[0011] In one embodiment, the outer peripheral wall of the third pipe is further provided with a third limiting groove around its own central axis. The second limiting groove and the third limiting groove are spaced apart along the first direction, and the second limiting groove is located away from the water inlet pipe relative to the third limiting groove. When the snap-fit ​​part snaps into the third limiting groove, the second water outlet pipe switches to the second position.

[0012] In one embodiment, the external filter further includes a cover, the housing has a filter groove, the cover is detachably connected to the housing, the cover blocks the opening of the filter groove to form the filter cavity, and the fourth pipe can be accommodated in the filter groove or extend out of the opening of the filter groove.

[0013] In one embodiment, the second outlet pipe includes a fifth pipe extending along a first direction and a sixth and a seventh pipe extending along a second direction. The fifth pipe is sleeved outside the first outlet pipe. The sixth and seventh pipes are connected to the side wall of the fifth pipe, and the seventh pipe is adjacent to the end of the fifth pipe away from the inlet pipe. The connection between the sixth and fifth pipes is the second outlet. The fifth outlet is provided at the end of the sixth pipe away from the fifth pipe and communicates with the filter chamber. The third outlet is provided at the end of the seventh pipe away from the fifth pipe. When the second outlet pipe is rotated and / or moved along the first direction, such that when the second outlet pipe is in the first position, the fifth outlet communicates with the first outlet through the second outlet, and the water flow in the inlet pipe can flow to the filter chamber through the sixth pipe; when the second outlet pipe is in the second position, the second outlet is spaced apart from the first outlet, and the water flow in the inlet pipe can flow to the outside of the housing through the seventh pipe. The first direction and the second direction are set at an angle.

[0014] In one embodiment, the external filter further includes a sealing ring. The outer peripheral wall of the first outlet pipe is provided with two fourth limiting grooves around its own central axis. The two fourth limiting grooves are respectively spaced apart on both sides of the first outlet along the first direction. The sealing ring is locked in each of the fourth limiting grooves and abuts against the inner side wall of the fifth pipe.

[0015] Secondly, an aquarium is provided, including a tank body and the aforementioned external filter, wherein the external filter can be hung on the tank body, the inlet pipe of the water inlet assembly of the external filter is inserted into the tank body, and the return port of the shell of the external filter communicates with the tank body.

[0016] The beneficial effects of this utility model are:

[0017] This utility model discloses an external filter. Through the design of the water inlet assembly, users can conveniently select the direction of water flow and control the position of the second outlet pipe as needed. This allows water from the inlet pipe to enter the filter chamber through the first and second outlets, achieving filtration and backflow, effectively cleaning the water, maintaining water clarity, and creating a healthy environment. Alternatively, the first and second outlets can be spaced apart, allowing water from the inlet pipe to exit the casing through a third outlet, reducing the hassle of water changes. This effectively enhances the functionality of the external filter, making it convenient to operate, saving time, and improving the user experience. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the usage state of an external filter in one embodiment;

[0019] Figure 2 This is a cross-sectional view of an external filter in use in one embodiment;

[0020] Figure 3 This is a schematic diagram of another usage state of the external filter in one embodiment;

[0021] Figure 4 This is a cross-sectional view of the water intake assembly in one embodiment, showing its usage state.

[0022] Figure 5 This is an exploded view of a water intake assembly in use in one embodiment;

[0023] Figure 6 This is a cross-sectional view of another usage state of the water intake assembly in one embodiment.

[0024] In the picture:

[0025] 1. Shell; 11. Filter chamber; 12. Return port; 2. Water inlet assembly; 21. Water inlet pipe; 22. Water pump; 3. Water intake assembly; 31. First water outlet pipe; 311. First water outlet; 312. First pipe; 313. Second pipe; 314. Fourth water outlet; 315. Snap-fit ​​part; 316. Connecting part; 32. Second water outlet pipe; 321. Third water outlet; 322. Second water outlet; 323. First limiting groove; 324. Third pipe; 325. Fourth pipe; 326. Second limiting groove; 4. Sealing ring; 5. Cover. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] like Figures 1 to 6As shown, an external filter according to this embodiment includes a housing 1, a water inlet assembly 2, and a water guiding assembly 3. The housing 1 contains a filter chamber 11 and a return port 12 communicating with the filter chamber 11. Filter media is disposed within the filter chamber 11. The water inlet assembly 2 includes an inlet pipe 21 and a water pump 22. The inlet pipe 21 is connected to the housing 1, and the water pump 22 is mounted on the inlet pipe 21. The water guiding assembly 3 includes a first outlet pipe 31 and a second outlet pipe 32. The first outlet pipe 31 communicates with the inlet pipe 21, and one of the first outlet pipe 31 and the second outlet pipe 32 is inserted inside the other. A first outlet 311 is provided on the side wall of the first outlet pipe 31, and the side wall of the second outlet pipe 32 corresponds to the first outlet 31. The aquarium is provided with a second water outlet 322 and a third water outlet 321 for discharging water out of the housing 1. The second water outlet 32 ​​has a first position and a second position. When the second water outlet 32 ​​is in the first position, the first water outlet 311 and the second water outlet 322 are connected, and the water in the inlet pipe 21 can flow to the filter chamber 11 through the first water outlet 311 and the second water outlet 322. After being filtered by the filter media in the filter chamber 11, the water flows back to the aquarium through the return port 12. When the second water outlet 32 ​​is in the second position, the first water outlet 311 and the second water outlet 322 are separated, and the water in the inlet pipe 21 can be discharged through the third water outlet 321 to achieve automatic drainage.

[0031] It is understood that the external filter of this utility model, through the setting of the water inlet component 3, allows the user to conveniently select the direction of water flow and control the position of the second water outlet pipe 32 as needed. This allows the water flow in the inlet pipe 21 to enter the filter chamber 11 through the first water outlet 311 and the second water outlet 322 to achieve filtration and backflow, effectively cleaning the water body, maintaining water quality clarity, and creating a healthy environment. Alternatively, the first water outlet 311 and the second water outlet 322 can be spaced apart, allowing the water flow in the inlet pipe 21 to be discharged outside the housing 1 through the third water outlet 321, reducing the cumbersomeness of water changing, effectively improving the functionality of the external filter, making it convenient to operate, saving time, and enhancing the user experience. Furthermore, the control is achieved by switching the position of the second water outlet pipe 32. Whether the first water outlet 311 and the second water outlet 322 are connected to achieve filtration and backflow, or the third water outlet 321 of the second water outlet pipe 32 is used for drainage, the water pump 22 on the inlet pipe 21 is used for driving. The structure is simple, the investment in the water pump 22 is reduced, and one water pump 22 can control the driving of two water outlet pipes, saving the space occupied by the external filter.

[0032] Furthermore, the first outlet pipe 31 includes a first pipe 312 and a second pipe 313. The first pipe 312 is connected to the inlet pipe 21 and extends along a first direction (the first direction is the X direction shown in the figure). The second pipe 313 is connected to the side wall of the first pipe 312. The connection between the first pipe 312 and the second pipe 313 is the first outlet 311. The second pipe 313 extends along a second direction (the second direction is the Y direction shown in the figure) and is located away from the first pipe. One end of 312 is provided with a fourth water outlet 314, which is connected to the filter chamber 11. The second water outlet pipe 32 is inserted into the first pipe 312. The second water outlet pipe 32 is rotated and / or moved along the first direction so that when the second water outlet pipe 32 is in the first position, the second water outlet 322 is connected to the fourth water outlet 314 through the first water outlet 311. The water flow in the inlet pipe 21 can flow to the filter chamber 11 through the second pipe 313. The first direction and the second direction are set at an angle.

[0033] In this embodiment, the first direction is vertical, meaning that the end of the second outlet pipe 32 adjacent to the inlet pipe 21 is located below the second pipe 313. Rotating the second outlet pipe 32 allows the second outlet 322 to be connected to or separated from the first outlet 311 of the first pipe 312. When the second outlet 322 is connected to the first outlet 311, since the second pipe 313 is lower than the third outlet 321, the water pump 22 drives the inlet pipe 21, pushing water from inside the aquarium, to preferentially enter the second pipe 313 through the second outlet 32 ​​and flow to the filter chamber 11 through the fourth outlet 314. When the second outlet 322 is separated from the first outlet 311, the first outlet 311 is blocked by the outer peripheral wall of the second outlet pipe 32, and the water in the inlet pipe 21 is discharged through the third outlet 321 of the second outlet pipe 32.

[0034] Furthermore, the second outlet pipe 32 is inserted into the first pipe 312, enabling a multi-pipe layout within a limited space, saving equipment installation space, and improving the system's compactness and integration. Besides rotating the second outlet pipe 32 to separate or connect the second outlet 322 with the first outlet 311, the second outlet 322 can also be separated or connected to the first outlet 311 by moving the second outlet pipe 32 along the first direction. Of course, the second outlet 322 can be separated or connected to the first outlet 311 by simultaneously rotating and moving the second outlet pipe 32.

[0035] Of course, in some embodiments, the first water outlet pipe 31 and the second water outlet pipe 32 can also be independently connected to the water outlet pipe of the water inlet pipe 21, and the water flow can be switched by using a plug that is movable in the water inlet pipe 21 to block the water inlet of the first water outlet pipe 31 or the water inlet of the second water outlet pipe 32.

[0036] Optionally, the external filter also includes a sealing ring 4. Two first limiting grooves 323 are arranged around the outer peripheral wall of the second outlet pipe 32 along its central axis. The two first limiting grooves 323 are respectively spaced apart on both sides of the second outlet 322 along the first direction. A sealing ring 4 is fitted into each first limiting groove 323, and the sealing ring 4 abuts against the inner wall of the first pipe 312. The sealing ring 4 effectively enhances the sealing between the outer peripheral wall of the second outlet pipe 32 and the inner wall of the first pipe 312, preventing water from flowing out of the pipe gaps. Furthermore, the tightness of the sealing ring 4 effectively strengthens the connection stability between the second outlet pipe 32 and the first pipe 312, ensuring relative stability between the second outlet pipe 32 and the first pipe 312 even after rotation or movement. In addition, the first limiting grooves 323 effectively enhance the installation accuracy and stability of the sealing ring 4 and the second outlet pipe 32, preventing the sealing ring 4 from shifting or loosening during use.

[0037] In some embodiments, the second water outlet pipe 32 includes a third pipe 324 and a fourth pipe 325. The length of the third pipe 324 extends along a first direction and is inserted into the first pipe 312. The end of the third pipe 324 away from the first pipe 312 is connected to the fourth pipe 325. The length of the fourth pipe 325 extends along a third direction (the third direction is the Z direction shown in the figure). The end of the fourth pipe 325 away from the third pipe 324 is provided with a third water outlet 321. The fourth pipe 325 and the second pipe 313 are spaced apart along the first direction. The third pipe 324 can move along the first direction, so that the inlet of the second water outlet pipe 32 is spaced apart from the inlet of the second pipe 313. The water flow in the inlet pipe 21 can pass through the third pipe 324 and the fourth pipe 325 and then be discharged from the third water outlet 321. The first direction and the third direction are set at an angle. The first direction is vertical, meaning the third pipe 324 can move vertically. The third pipe 324 can move vertically and rotate around its central axis, increasing the distance between the second outlet pipe 32 and the first outlet 311. During drainage, the third pipe 324 can be raised and rotated to extend the fourth pipe 325 outside the filter chamber 11, or during filtration, it can be lowered and rotated to retract the fourth pipe 325 into the filter chamber 11. The structure is compact, practical, and easy to store. During drainage, the fourth pipe 325 extends outside the filter chamber 11, with the third direction perpendicular to the second direction. During filtration, the fourth pipe 325 is housed within the filter chamber 11, with the second direction parallel to the third direction.

[0038] Furthermore, the outer peripheral wall of the third pipe 324 is provided with a second limiting groove 326 around its central axis, and the inner side wall of the first pipe 312 is provided with a snap-fit ​​part 315, which is adjacent to the end of the first pipe 312 away from the inlet pipe 21. When the snap-fit ​​part 315 snaps into the second limiting groove 326, the second outlet pipe 32 switches to the first position. By engaging the snap-fit ​​part 315 with the second limiting groove 326, the switching accuracy of the positions of the third pipe 324 and the first pipe 312 when the second outlet pipe 32 switches can be improved, ensuring the connection stability between the third pipe 324 and the first pipe 312.

[0039] Furthermore, the outer peripheral wall of the third pipe 324 is provided with a third limiting groove around its central axis. The second limiting groove 326 and the third limiting groove are spaced apart along the first direction, and the second limiting groove 326 is positioned away from the inlet pipe 21 relative to the third limiting groove. The snap-fit ​​part 315 snaps into the third limiting groove, and the second outlet pipe 32 switches to the second position. By engaging the snap-fit ​​part 315 with the third limiting groove, the switching accuracy between the third pipe 324 and the first pipe 312 can be improved when the second outlet pipe 32 is switched. It can also prevent the third pipe 324 from being pulled out of the first pipe 312 when it is raised, thus ensuring the connection stability between the third pipe 324 and the first pipe 312.

[0040] Optionally, a plurality of connecting portions 316 are spaced apart on the side of the first pipe 312 away from the inlet pipe 21. The plurality of connecting portions 316 are spaced apart around the central axis of the first pipe 312, and a snap-fit ​​portion 315 is provided on the side of the connecting portion 316 facing the central axis of the first pipe 312. That is, the spacing between two adjacent connecting portions 316 allows the end of the connecting portion 316 away from the inlet pipe 21 to deform in a direction away from the central axis of the first pipe 312 when the height of the third pipe 324 is switched, so that the snap-fit ​​portion 315 can disengage from the snap-fit ​​groove, thereby improving the convenience of switching.

[0041] Preferably, the external filter also includes a cover 5. The housing 1 has a filter groove, and the cover 5 is detachably connected to the housing 1. The cover 5 seals the opening of the filter groove to form a filter chamber 11. The fourth pipe 325 can be accommodated in the filter groove or extend out of the opening of the filter groove. In normal use, the second water outlet pipe 32 is stored in the filter groove and sealed with the cover 5. This improves the aesthetics of the external filter and effectively protects the structure inside the filter groove, thereby enhancing the safety and service life of the external filter.

[0042] In summary, the working process of this external filter during daily use is as follows: the water pump 22 drives the water in the aquarium to flow from the inlet pipe 21 to the first pipe 312 and then into the third pipe 324. The water then flows through the second outlet pipe 32, the second outlet 322, and the first outlet 311 into the second pipe 313 and is discharged into the filter chamber 11 through the fourth outlet 314. After being filtered by the filter media in the filter chamber 11, the water flows back to the aquarium through the return port 12. After a period of use, the cover 5 is removed, the third pipe 324 is raised and rotated appropriately so that the end of the fourth pipe 325 away from the third pipe 324 extends out of the filter chamber 11. The second outlet 322 is spaced apart from the first outlet 311, and the third outlet 321 is located outside the shell 1. Driven by the water pump 22, the water in the aquarium flows from the inlet pipe 21 to the first pipe 312 and then enters the third pipe 324, and is discharged out of the aquarium through the fourth pipe 325 and the third outlet 321.

[0043] In some embodiments, the second outlet pipe 32 includes a fifth pipe extending in a first direction and a sixth and a seventh pipe extending in a second direction. The fifth pipe is sleeved outside the first outlet pipe 31. The sixth and seventh pipes are connected to the side wall of the fifth pipe, and the seventh pipe is adjacent to the end of the fifth pipe away from the inlet pipe 21. The connection between the sixth and fifth pipes is the second outlet 322. The end of the sixth pipe away from the fifth pipe is provided with the fifth outlet, which communicates with the filter chamber 11. The seventh pipe is located away from the fifth pipe. One end of the channel is provided with a third water outlet 321. The second water outlet pipe 32 is rotated and / or moved along the first direction. When the second water outlet pipe 32 is in the first position, the fifth water outlet is connected to the first water outlet 311 through the second water outlet 322. The water flow in the inlet pipe 21 can flow to the filter chamber 11 through the sixth pipe. When the second water outlet pipe 32 is in the second position, the second water outlet 322 is spaced apart from the first water outlet 311. The water flow in the inlet pipe 21 can flow to the outside of the shell 1 through the seventh pipe. The first direction and the second direction are set at an angle.

[0044] In other words, the sixth pipe is lower than the seventh pipe. Therefore, when the second outlet pipe 32 is rotated to connect the first outlet 311 and the second outlet 322, the water pressure is insufficient to push the water into the seventh pipe. The water in the inlet pipe 21 can flow from the first outlet pipe 31 and the sixth pipe to the filter chamber 11. When the second outlet pipe 32 is rotated to separate the first outlet 311 and the second outlet 322, that is, when the second outlet 322 is blocked by the first outlet pipe 31, the water in the inlet pipe 21 passes through the first outlet pipe 31, the fifth pipe, and the seventh pipe and is discharged from the fifth outlet. Of course, in addition to rotating the second outlet pipe 32 to separate or connect the second outlet 322 and the first outlet 311, the second outlet 322 can also be separated or connected to the first outlet 311 by moving the second outlet pipe 32 along the first direction. Of course, the second water outlet 322 can be rotated and moved at the same time to make the second water outlet 322 separate from or connected to the first water outlet 311.

[0045] It should be noted that the first water outlet pipe 31 is a straight pipe extending along the first direction, and the first water outlet pipe 31 is located inside the fifth pipe.

[0046] Furthermore, the external filter also includes a sealing ring 4. Two fourth limiting grooves are arranged around the outer peripheral wall of the first outlet pipe 31 along its central axis. These four fourth limiting grooves are spaced apart on both sides of the first outlet 311 along the first direction. A sealing ring 4 is fitted into each fourth limiting groove, and the sealing ring 4 abuts against the inner wall of the fifth pipe. The sealing ring 4 effectively enhances the sealing between the outer peripheral wall of the first outlet pipe 31 and the inner wall of the fifth pipe, preventing water from flowing out of the pipe gaps. The sealing ring 4 also effectively strengthens the connection stability between the second outlet pipe 32 and the first pipe 312, ensuring that the second outlet pipe 32 remains relatively stable with the first pipe 312 even after rotation or movement. In addition, the fourth limiting grooves effectively enhance the installation accuracy and stability of the sealing ring 4 and the first outlet pipe 31, preventing the sealing ring 4 from shifting or loosening during use.

[0047] An embodiment of this utility model also provides an aquarium, including a tank body and an external filter of any of the above embodiments. The external filter can be hung on the tank body. The water inlet pipe 21 of the water inlet assembly 2 of the external filter is inserted into the tank body. The return port 12 of the shell 1 of the external filter communicates with the tank body.

[0048] Understandably, the external filter for this aquarium, through the water intake component 3, allows users to conveniently select the direction of water flow and control the position of the second outlet pipe 32 as needed. This allows water from the inlet pipe 21 to enter the filter chamber 11 through the first outlet 311 and the second outlet 322, achieving filtration and backflow, effectively cleaning the water, maintaining water clarity, and creating a healthy environment. Alternatively, the first outlet 311 and the second outlet 322 can be spaced apart, allowing water from the inlet pipe 21 to exit the housing 1 through the third outlet 321, reducing the hassle of water changes, effectively improving the functionality of the external filter, making it convenient to operate, saving time, enhancing the user experience, and thus improving the aquarium's product competitiveness.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An external filter, characterized in that, include: The housing has a filter chamber and a return port communicating with the filter chamber, and the filter chamber is provided with filter media. A water inlet assembly, comprising a water inlet pipe and a water pump, wherein the water inlet pipe is connected to the housing and the water pump is mounted on the water inlet pipe; The water intake assembly includes a first outlet pipe and a second outlet pipe. The first outlet pipe is connected to the inlet pipe, and one of the first outlet pipe and the second outlet pipe is inserted inside the other. The side wall of the first outlet pipe is provided with a first outlet, and the side wall of the second outlet pipe is provided with a second outlet corresponding to the first outlet. The second outlet pipe is also provided with a third outlet for discharging water outside the housing. The second outlet pipe has a first position and a second position. When the second outlet pipe is in the first position, the first outlet and the second outlet are connected, and the water in the inlet pipe can flow to the filter chamber through the first outlet and the second outlet. When the second outlet pipe is in the second position, the first outlet and the second outlet are spaced apart, and the water in the inlet pipe can be discharged through the third outlet.

2. The external filter according to claim 1, characterized in that, The first outlet pipe includes a first pipe and a second pipe. The first pipe is connected to the inlet pipe and extends along a first direction. The second pipe is connected to the side wall of the first pipe. The connection between the first pipe and the second pipe is the first outlet. The second pipe extends along a second direction. A fourth outlet is provided at the end of the second pipe away from the first pipe. The fourth outlet communicates with the filter chamber. The second outlet pipe is inserted into the first pipe. When the second outlet pipe is rotated and / or moved along the first direction, so that the second outlet is in the first position, the second outlet communicates with the fourth outlet through the first outlet. The water in the inlet pipe can flow to the filter chamber through the second pipe. The first direction and the second direction are set at an angle.

3. The external filter according to claim 2, characterized in that, It also includes a sealing ring. The outer peripheral wall of the second water outlet pipe is provided with two first limiting grooves around its own central axis. The two first limiting grooves are respectively arranged at intervals on both sides of the second water outlet along the first direction. The sealing ring is locked in each first limiting groove and abuts against the inner side wall of the first pipe.

4. The external filter according to claim 2, characterized in that, The second outlet pipe includes a third pipe and a fourth pipe. The length of the third pipe extends along the first direction and is inserted into the first pipe. The end of the third pipe away from the first pipe is connected to the fourth pipe. The length of the fourth pipe extends along the third direction. The end of the fourth pipe away from the third pipe is provided with the third outlet. The fourth pipe and the second pipe are spaced apart along the first direction. The third pipe can move along the first direction to separate the inlet of the second outlet pipe from the inlet of the second pipe. The water in the inlet pipe can pass through the third pipe and the fourth pipe and then be discharged from the third outlet. The first direction and the third direction are set at an angle.

5. The external filter according to claim 4, characterized in that, The outer peripheral wall of the third pipe is provided with a second limiting groove around its own central axis, and the inner side wall of the first pipe is provided with a snap-fit ​​part, and the snap-fit ​​part is adjacent to the end of the first pipe away from the water inlet pipe. When the snap-fit ​​part snaps with the second limiting groove, the second water outlet pipe switches to the first position.

6. The external filter according to claim 5, characterized in that, The outer peripheral wall of the third pipe is also provided with a third limiting groove around its own central axis. The second limiting groove and the third limiting groove are spaced apart along the first direction, and the second limiting groove is located away from the water inlet pipe relative to the third limiting groove. When the snap-fit ​​part snaps into the third limiting groove, the second water outlet pipe switches to the second position.

7. The external filter according to claim 4, characterized in that, It also includes a cover, the housing has a filter groove, the cover is detachably connected to the housing, the cover blocks the opening of the filter groove to form the filter cavity, and the fourth pipe can be accommodated in the filter groove or extend out of the opening of the filter groove.

8. The external filter according to claim 1, characterized in that, The second outlet pipe includes a fifth pipe extending along a first direction and a sixth and a seventh pipe extending along a second direction. The fifth pipe is sleeved outside the first outlet pipe. The sixth and seventh pipes are connected to the side wall of the fifth pipe, and the seventh pipe is adjacent to the end of the fifth pipe away from the inlet pipe. The connection between the sixth and fifth pipes is the second outlet. The fifth outlet is provided at the end of the sixth pipe away from the fifth pipe and is connected to the filter chamber. The third outlet is provided at the end of the seventh pipe away from the fifth pipe. When the second outlet pipe is rotated and / or moved along the first direction, such that it is in the first position, the fifth outlet is connected to the first outlet through the second outlet, and the water in the inlet pipe can flow to the filter chamber through the sixth pipe. When the second outlet pipe is in the second position, the second outlet is spaced apart from the first outlet, and the water in the inlet pipe can flow to the outside of the housing through the seventh pipe. The first direction and the second direction are set at an angle.

9. The external filter according to claim 8, characterized in that, It also includes a sealing ring. The outer peripheral wall of the first water outlet pipe is provided with two fourth limiting grooves around its own central axis. The two fourth limiting grooves are respectively arranged at intervals on both sides of the first water outlet along the first direction. The sealing ring is locked in each of the fourth limiting grooves and the sealing ring abuts against the inner side wall of the fifth pipe.

10. An aquarium, characterized in that, The device includes a housing and an external filter as described in any one of claims 1-9, wherein the external filter can be hung on the housing, the inlet pipe of the inlet assembly of the external filter is inserted into the housing, and the return port of the housing of the external filter communicates with the housing.

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